Absorption is defined as

Absorption is defined as

• A. The process by which the body eliminates a drug
• B. The process by which the body takes in or receives a drug
• C. The distribution of a drug to tissues
• D. The metabolism of a drug

Answer: (B)

Absorption is the process by which a drug enters the body and reaches the bloodstream from the site of administration. This is why it’s the best definition: it describes taking in or receiving the drug into the body so it can start moving through the system. Think about how a pill you swallow must dissolve in the stomach or intestines and cross the lining into the blood to become available for action. Some routes, like intravenous administration, deliver the drug directly into circulation, so there’s little or no absorption step to wait for. The other terms describe what happens after absorption: distribution sends the drug to tissues, metabolism changes it, and elimination removes it from the body. Understanding absorption helps explain differences in how quickly a drug acts with different routes and conditions like meals or stomach pH.

Absorption is the process by which a drug enters the body and reaches the bloodstream from the site of administration. This is why it’s the best definition: it describes taking in or receiving the drug into the body so it can start moving through the system.

Think about how a pill you swallow must dissolve in the stomach or intestines and cross the lining into the blood to become available for action. Some routes, like intravenous administration, deliver the drug directly into circulation, so there’s little or no absorption step to wait for. The other terms describe what happens after absorption: distribution sends the drug to tissues, metabolism changes it, and elimination removes it from the body. Understanding absorption helps explain differences in how quickly a drug acts with different routes and conditions like meals or stomach pH.